A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines

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dc.contributor.advisorSwarts, Andréen_ZA
dc.contributor.advisorYates, Andrewen_ZA
dc.contributor.authorLondleni, Sibusiso Cen_ZA
dc.date.accessioned2014-07-31T11:21:07Z
dc.date.available2014-07-31T11:21:07Z
dc.date.issued2006en_ZA
dc.descriptionIncludes bibliographical references.
dc.description.abstractHomogeneous Charge Compression Ignition (HCCI) is an alternative internal combustion (IC) engine that can provide high efficiencies while producing ultra-low nitrous oxides (NOx) and particulate matter (PM) emissions compared to existing compression ignition (CI) and spark ignition (SI) engines. HCCI engines operate on the principle of having a dilute, premixed charge that reacts and burns volumetrically throughout the cylinder as it is compressed by the piston. The large amounts of charge dilution also dramatically reduce the peak burned gas temperatures resulting in low NOx emissions. Since there is no fuel-rich diffusion burning taking place, the PM emissions are at near zero levels. In theory, HCCI combustion can be achieved with any fuel that evaporates readily and autoignite under the conditions typically found in an internal combustion engine. In some regards, HCCI incorporates the best features of both SI and CI engine. As in a SI engine, the charge is well mixed, which minimises particulate emissions and as in a CI engine, the charge is compression ignited and has no throttling losses, which leads to high thermal efficiencies. However, unlike either of these conventional engines, the combustion occurs simultaneously throughout the combustion chamber without a flame front, eliminating the flammability limits associated with SI combustion. The HCCI engine can provide efficiencies as high as compression ignition engines while generating extremely low NOx emissions, as low as 1-5% tailpipe NOx of a conventional SI engine.en_ZA
dc.identifier.apacitationLondleni, S. C. (2006). <i>A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering. Retrieved from http://hdl.handle.net/11427/5517en_ZA
dc.identifier.chicagocitationLondleni, Sibusiso C. <i>"A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 2006. http://hdl.handle.net/11427/5517en_ZA
dc.identifier.citationLondleni, S. 2006. A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Londleni, Sibusiso C AB - Homogeneous Charge Compression Ignition (HCCI) is an alternative internal combustion (IC) engine that can provide high efficiencies while producing ultra-low nitrous oxides (NOx) and particulate matter (PM) emissions compared to existing compression ignition (CI) and spark ignition (SI) engines. HCCI engines operate on the principle of having a dilute, premixed charge that reacts and burns volumetrically throughout the cylinder as it is compressed by the piston. The large amounts of charge dilution also dramatically reduce the peak burned gas temperatures resulting in low NOx emissions. Since there is no fuel-rich diffusion burning taking place, the PM emissions are at near zero levels. In theory, HCCI combustion can be achieved with any fuel that evaporates readily and autoignite under the conditions typically found in an internal combustion engine. In some regards, HCCI incorporates the best features of both SI and CI engine. As in a SI engine, the charge is well mixed, which minimises particulate emissions and as in a CI engine, the charge is compression ignited and has no throttling losses, which leads to high thermal efficiencies. However, unlike either of these conventional engines, the combustion occurs simultaneously throughout the combustion chamber without a flame front, eliminating the flammability limits associated with SI combustion. The HCCI engine can provide efficiencies as high as compression ignition engines while generating extremely low NOx emissions, as low as 1-5% tailpipe NOx of a conventional SI engine. DA - 2006 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2006 T1 - A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines TI - A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines UR - http://hdl.handle.net/11427/5517 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/5517
dc.identifier.vancouvercitationLondleni SC. A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 2006 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/5517en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Mechanical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherMechanical Engineeringen_ZA
dc.titleA theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI enginesen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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